I used two same segments for comparison and calculate DICE using RTslicer module, but get the wrong result.
Can’t reproduce. I am getting the expected 1.0. Make sure both segments have the same information. The simplest would be copying the contents of one segment to the other via the logical operators.
Most likely during your segmentation you didn’t allow overlap between segments (by default changes modify all segments), hence there is no overlap between two segmentation and the reported value of 0.
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